One of the main challenges is the transaction processing capacity. Currently, the Bitcoin network can handle a limited number of transactions per second, which can result in delays and higher fees during periods of high demand. This limitation has led to the development of solutions like the Lightning Network, which aims to improve scalability by enabling faster and cheaper off-chain transactions.
If you want to have faster transaction speed, use altcoins but their blockchains are smaller in total hash rates or more vulnerable to smart contract exploitations.
If you want security, use Bitcoin and accept slower transaction time but let's say you will surely get more security for your on-chain transactions. Asking Bitcoin developers to change the protocol, community to vote yes on it, to make Bitcoin blockchain less secured like altcoin blockchains is bad proposal.
Another challenge is the environmental impact of Bitcoin mining. The process of mining requires a significant amount of computational power and energy consumption, which can have negative implications for the environment.
Bitcoin Mining Industry consumes less energy than other industries and it uses more renewable energy resources than other industries and nations too.
If anyone tell you Bitcoin mining industry has a big threat for global environment, they tell you fud.
Debunking the "Bitcoin is an environmental disaster" argumenthttps://endthefud.org/energy